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Book Chapter

Geological studies in tsunami research since the 2011 Tohoku earthquake

By
Simon R. Wallis
Simon R. Wallis
1
Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, Nagoya, 464-8601, Japan
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Osamu Fujiwara
Osamu Fujiwara
2
Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8567, Japan
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Kazuhisa Goto
Kazuhisa Goto
3
International Research Institute of Disaster Science, Tohoku University, Sendai 980-0845, Japan
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Published:
January 01, 2018

Abstract

The 2011 Tohoku earthquake, tsunami and resulting damage is often referred to as 3.11 after the date on which it took place. Leading to almost 20 000 people dead or missing, a major nuclear disaster and severe economic damage, 3.11 represents the biggest challenge faced by Japan since the end of World War II. Before 3.11, the possibility of a Mw 9 earthquake in this area was not generally recognized, highlighting the need to reassess seismic risk in NE Japan. The large amount of new quantitative data covering a range of disciplines and from onshore and offshore studies makes 3.11 an important case study that can contribute to improving our understanding of tsunamis, including their formation, their effects on coastal regions and the effectiveness of defensive measures old and new. Geological studies have a key role to play in this new phase of tsunami studies and this is the only method available for determining recurrence intervals over timescales of thousands of years. Data from 3.11 have improved our ability to identify sedimentary records of tsunami events and to estimate tsunami size from geological data. More complete databases will provide invaluable information for long-term planning of coastal regions in convergent plate margins.

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Contents

Geological Society, London, Special Publications

Tsunamis: Geology, Hazards and Risks

E. M. Scourse
E. M. Scourse
MCM Environmental Services Ltd, UK
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N. A. Chapman
N. A. Chapman
University of Sheffield, UK
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D. R. Tappin
D. R. Tappin
British Geological Survey, UK
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S. R. Wallis
S. R. Wallis
Nagoya University, Japan
University of Tokyo, Japan
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The Geological Society of London
Volume
456
ISBN electronic:
9781786203373
Publication date:
January 01, 2018

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